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Analog Devices Inc./Maxim Integrated MAX40001AUT12+T
- Part No.:
- MAX40001AUT12+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-6
- Datasheet:
-
MAX40001AUT12+T.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:3,008
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Product details
Overview
The MAX40001AUT12+T from Maxim Integrated is a nanoPower open-drain comparator with integrated 1.252V precision voltage reference, designed for ultra-low-power sensing and level-detection functions in space-constrained portable electronics. It operates from 1.7V to 5.5V, draws only 0.9μA supply current, features 2.5mV internal hysteresis, and is fully specified over –40°C to +125°C for automotive-grade reliability.
For engineers reviewing the MAX40001AUT12+T datasheet, MAX40001AUT12+T pinout, MAX40001AUT12+T application, or MAX40001AUT12+T equivalent, this page delivers verified technical context, package-validated pin roles, real-world use-value per application, and two confirmed alternative comparators with documented functional and application-level differences.
Technical Context
The MAX40001AUT12+T integrates a factory-trimmed bandgap reference (±1% initial accuracy, <2.5% over –40°C to +125°C) and a rail-to-rail input stage with –0.2V to VDD + 0.2V common-mode range. Its open-drain output supports pullup voltages up to 5.5V independent of VDD, enabling logic-level translation between mismatched supply domains.
It employs a break-before-make output architecture that minimizes switching current surges, reducing supply-line glitches and easing bypassing requirements. Internal 2.5mV hysteresis eliminates oscillation near threshold without external components, while propagation delay remains under 14.8μs (L→H, 100kΩ pullup) across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.7V to 5.5V - supports direct operation from 1.8V/2.5V/3V/5V rails without regulation. |
| Quiescent Current | 0.9μA typical - extends battery life in always-on monitoring circuits (e.g., >1 year on 200mAh coin cell). |
| Reference Voltage | 1.252V ±1% at +25°C, ±2.5% over –40°C to +125°C - eliminates need for external precision reference IC or resistor divider. |
| Input Common-Mode Range | –0.2V to VDD + 0.2V - accepts signals slightly beyond supply rails, simplifying sensor interfacing. |
| Propagation Delay | 14.8μs max (L→H, 100kΩ pullup) - enables reliable detection of slow-moving thresholds (e.g., battery voltage decay). |
| Output Type | Open-drain - allows wired-OR configuration and level-shifting (e.g., 5V-sensed signal → 3V logic interface). |
| Hysteresis | 2.5mV internal - prevents chatter on noisy or slowly varying inputs without external feedback resistors. |
Pinout & Package
MAX40001AUT12+T is packaged in a 6-pin SOT23 (package code U6+1), footprint-compatible with industry-standard SOIC-6 but with 2.9mm × 1.6mm body size and 0.95mm height. The package supports reflow soldering (JEDEC J-STD-020) and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for reference, comparator, and output stages; requires local 0.1μF bypass to minimize noise coupling. |
| 2 (REF) | Internal reference output | Provides stable 1.252V reference; stable with ≤100pF capacitive load; source/sink capability ≤100nA. |
| 3 (IM) | Inverting input | Accepts threshold or reference signal; common-mode range extends –0.2V to VDD + 0.2V. |
| 4 (OUT) | Open-drain output | Drains current only; requires external pullup (e.g., 100kΩ to 3.3V); supports voltages up to 5.5V on OUT pin. |
| 5 (VDD) | Positive supply | Power input (1.7V–5.5V); bypass with 0.1μF capacitor close to pin to suppress high-frequency noise. |
| 6 (IP) | Noninverting input | Accepts sensed signal (e.g., battery voltage, sensor output); matched input bias current minimizes offset error. |
Key Features
| Feature | Design Value |
|---|---|
| NanoPower operation | 0.9μA supply current enables multi-year battery life in always-on wake-up or low-duty-cycle monitoring systems. |
| Integrated 1.252V reference | ±1% initial accuracy eliminates external reference IC or precision resistor network, saving ≥2 BOM line items and PCB area. |
| Open-drain output with 5.5V tolerance | Enables level translation (e.g., 5V sensor → 3.3V MCU) and wired-OR fault detection across multiple comparators. |
| 2.5mV internal hysteresis | Prevents false triggering on EMI or slow-rising signals without requiring external positive feedback resistors. |
| Rail-to-rail input range | –0.2V to VDD + 0.2V input common-mode allows direct connection to unbuffered sensors or battery terminals. |
Applications
| Cell Phone Battery Monitoring | Wearable Health Sensor Threshold Detection |
|---|---|
|
Use Scenario: Detecting low-battery condition (<3.3V) in lithium-ion powered smartphones during standby mode. IC Role / Device Role / Timing Role: Comparator compares battery voltage against internal 1.252V reference scaled by external resistor divider; triggers interrupt on MCU when threshold crossed. Use Value: 0.9μA quiescent current ensures negligible impact on standby battery drain; open-drain output interfaces directly to 1.8V/3.3V interrupt line. |
Use Scenario: Triggering alert when heart rate sensor output exceeds safe upper limit in wrist-worn medical device. IC Role / Device Role / Timing Role: Compares analog sensor output against fixed 1.252V reference; hysteresis prevents false alarms from motion-induced noise. Use Value: Internal 2.5mV hysteresis removes need for external RC network; WLP/SOT23 footprint fits tight wearable PCB layouts. |
| Notebook System Power-On Sequence Control | Industrial IoT Node Supply Rail Validation |
|
Use Scenario: Validating 5V auxiliary rail presence before enabling downstream 3.3V LDO in laptop power tree. IC Role / Device Role / Timing Role: Uses VDD = 5V, REF = 1.252V, and resistor divider to set ~4.7V trip point; open-drain output pulls enable line low until rail stabilizes. Use Value: 5.5V-tolerant OUT pin allows direct connection to 5V rail without level shifter; –40°C to +125°C rating covers full notebook thermal envelope. |
Use Scenario: Monitoring 12V field bus voltage for undervoltage lockout in battery-backed industrial sensor node. IC Role / Device Role / Timing Role: Scaled input (via resistive divider) compared to 1.252V reference; output drives optocoupler LED to isolate fault signal. Use Value: Input common-mode range up to VDD + 0.2V allows direct high-side sensing; 1.7V min VDD supports operation during brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator-with-reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV4041DBVR | Fixed 1.2V reference (±0.5% initial), 650nA IDD, push-pull output, no open-drain option. | Lacks 5.5V-tolerant output; unsuitable for level translation or wired-OR configurations. | Select when lowest possible supply current is critical and open-drain functionality is not required. |
| MAX9062ASA+ | 1.25V reference (±0.5% initial), 1.1μA IDD, open-drain output, but only rated –40°C to +85°C. | Not qualified for automotive or extended-temperature industrial use; lacks internal hysteresis. | Select for commercial-temperature consumer applications where tighter reference accuracy justifies higher cost and reduced temp range. |
Compared with TLV4041DBVR and MAX9062ASA+, the MAX40001AUT12+T uniquely combines automotive temperature rating, internal hysteresis, open-drain flexibility, and 1.252V reference accuracy-making it optimal for robust, low-power, level-sensitive detection in harsh or space-constrained environments.
Availability
MAX40001AUT12+T is available at Aetrix Electronics and suitable for cell phone battery monitoring, wearable health sensor threshold detection, notebook power sequencing, and industrial IoT supply rail validation requiring stable component supply across automotive and extended-temperature deployments.
Supply support for MAX40001AUT12+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX40000/MAX40001 family was engineered specifically for ultra-low-power, space-constrained portable electronics-delivering integrated reference, nanoscale packaging, and automotive-grade reliability in a single comparator die.
FAQ
What is the reference voltage accuracy of the MAX40001AUT12+T over temperature?
The MAX40001AUT12+T features a factory-trimmed internal reference with ±1% initial accuracy at +25°C and guaranteed ±2.5% accuracy over the full –40°C to +125°C operating range. This eliminates calibration overhead in battery-monitoring and sensor-threshold applications where long-term stability matters more than millivolt-level precision.
Can the MAX40001AUT12+T operate from a 1.8V supply and still drive a 3.3V logic interface?
Yes. The MAX40001AUT12+T operates down to 1.7V and its open-drain output is rated to 5.5V. When powered from 1.8V, connect a pullup resistor from the OUT pin to 3.3V - the output will cleanly switch between high-impedance and ground, enabling reliable 1.8V-sensed signal → 3.3V logic translation without additional level-shifters.
Does the MAX40001AUT12+T require external hysteresis for stable operation?
No. The MAX40001AUT12+T includes 2.5mV of internal hysteresis, which prevents oscillation on slow-moving or noisy inputs - such as battery voltage decay or thermistor outputs - without external resistors. External hysteresis is only needed if >2.5mV is required for specific noise immunity targets.
What is the maximum capacitive load the REF pin can drive?
The REF pin of the MAX40001AUT12+T is stable with capacitive loads up to 100pF. For bypassing, a 0.1μF ceramic capacitor is recommended on VDD, but REF typically requires no capacitor unless driving high-impedance dividers or op-amp buffers - in which case a low-leakage film capacitor may be used.
Is the MAX40001AUT12+T pin-compatible with other members of the MAX40000/MAX40001 family?
Yes - all MAX40000/MAX40001 variants in the same package (e.g., SOT23) share identical pinout and footprint. The MAX40001AUT12+T (1.252V ref, open-drain) can be substituted with MAX40001AUT16+T (1.66V ref) or MAX40000AUT12+T (1.252V ref, push-pull) without PCB changes, provided system-level electrical requirements align.
MAX40001AUT12+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- with Voltage Reference
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 1.7V ~ 5.5V
- :
- 8mV
- Voltage - Input Offset (Max):
- 0.005µA
- Current - Input Bias (Max):
- 2mA
- Current - Output (Typ):
- 1.7µA
- Current - Quiescent (Max):
- 46dB CMRR, 60dB PSRR (Min)
- CMRR, PSRR (Typ):
- 14µs (Typ)
- Propagation Delay (Max):
- 2.5mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-6
MAX40001AUT12+T FAQ
1.How can I place an order for MAX40001AUT12+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40001AUT12+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX40001AUT12+T reliable?
The price and inventory of MAX40001AUT12+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40001AUT12+T is usually 5 days.
3.What payment methods are accepted for MAX40001AUT12+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40001AUT12+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40001AUT12+T?
MAX40001AUT12+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40001AUT12+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX40001AUT12+T?
For technical support, including MAX40001AUT12+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40001AUT12+T requirements.
6.How does Aetrix verify that MAX40001AUT12+T is sourced from the original manufacturer or authorized distributors?
All MAX40001AUT12+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX40001AUT12+T meets industry standards.
7.What is the process for return or replacement of MAX40001AUT12+T?
All MAX40001AUT12+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX40001AUT12+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX40001AUT12+T part is unused and in its original packaging.
Return procedure for MAX40001AUT12+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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